I agree with germ_boi above.
I think the design of the hardware is just one of the reason why people buy macs. Of course, who would want to buy a laptop that you'll be ashamed to take out in a coffee shop? It really helps if the hardware looks good but good looking hardware is not enough. The software side is also great. Sure, Mac OSX is not 100% secure and you can still get attacked but it's nothing compared to the number of Windows viruses that you can get. Antivirus software is one of the things that slows down Windows. With macs, you may want to run antivirus and antimalware software in the background, but most people don't and in the current state of things, you probably don't need it anyways. As a result, the operating system and application generally run more quickly.
The bundled software is also good. iTunes is already installed. The iLife suite is good enough for most people. Safari is decent and it doesn't come with crapware that most PC manufacturers bundles on their machines -- those browser toolbars that eats up a lot of space and other utilities that runs in the background and slows down the machine. It also comes with a built-in PDF viewer that is faster than Adobe Reader. There are a lot of well written software available on a Mac. Simple things like sleep mode works too - just close the lid and it goes to sleep. Open it up and it wakes up quickly. Wireless networking is built in and is stupidly easy to set up.
The hardware specs is also decent - so long as you compare it to PC laptop of the same class and not to a cheap netbook.